As a result stromatolites can grow here undisturbed.
Some of these structures are up to 1.5 meters high and have taken thousands of years to grow.
These are estimated to be over three billion years old.
The presence of stromatolites were a major factor in Shark Bay being declared a UNESCO World Heritage site.
Photo credit:cskk/Flickr
Photo credit:Rob Berends/Flickr
Photo credit:Sarah Huffman/Flickr
Sources:www.sharkbay.org.au/Wikipedia/www.sharkbaywa.com.au
